US20150057653A1 - Medical wireless power supply system - Google Patents

Medical wireless power supply system Download PDF

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Publication number
US20150057653A1
US20150057653A1 US14/537,080 US201414537080A US2015057653A1 US 20150057653 A1 US20150057653 A1 US 20150057653A1 US 201414537080 A US201414537080 A US 201414537080A US 2015057653 A1 US2015057653 A1 US 2015057653A1
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Prior art keywords
power transmission
trocar
coil
transmission coil
power supply
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Abandoned
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US14/537,080
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English (en)
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Yuta Sugiyama
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Olympus Corp
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Olympus Corp
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Publication of US20150057653A1 publication Critical patent/US20150057653A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/1206—Generators therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421—Cannulas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/148—Probes or electrodes therefor having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3476—Powered trocars, e.g. electrosurgical cutting, lasers, powered knives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3462—Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals
    • A61B2017/3466—Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals for simultaneous sealing of multiple instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00589—Coagulation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/1206—Generators therefor
    • A61B2018/1286—Generators therefor having a specific transformer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1412—Blade
    • A61B2018/1415—Blade multiple blades
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/20—The network being internal to a load
    • H02J2310/23—The load being a medical device, a medical implant, or a life supporting device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Definitions

  • the present invention relates to a medical wireless power supply system and, more particularly, to a medical wireless power supply system that performs power supply to a medical instrument wirelessly.
  • Japanese Patent Application Laid-Open Publication No. H11-128242 discloses a configuration for causing electromagnetic induction between a power transmission coil provided in a trocar and a power reception coil provided in a surgical operation instrument to thereby supply electric surgical operation energy to the surgical operation instrument inserted into the trocar.
  • a medical wireless power supply system includes: a trocar; a power transmission coil provided in a state in which at least a part thereof is covered with a nonconductive member; a power transmission coil unit including the power transmission coil and configured to be capable of resonating at a predetermined resonance frequency; a medical instrument including a cylindrical insertion portion insertable into an insertion hole of the trocar; a power reception coil provided in a state in which at least a part thereof is covered with a nonconductive member on an inside of the insertion portion; and a power reception coil unit including the power reception coil and configured to be capable of resonating at a resonance frequency that coincides with the predetermined resonance frequency.
  • FIG. 1A is a diagram showing an external appearance of a trocar according to a first embodiment
  • FIG. 1B is a diagram showing a configuration of a main part of the trocar according to the first embodiment
  • FIG. 2 is a diagram showing a configuration of a main part of a bipolar electric knife according to the first embodiment
  • FIG. 3 is a diagram showing a distal end portion of the bipolar electric knife in FIG. 2 in enlargement
  • FIG. 4 is a diagram showing an example of a state in which the bipolar electric knife is inserted through the trocar
  • FIG. 5 is a diagram showing a configuration of a main part of a medical wireless power supply system including the trocar and the bipolar electric knife;
  • FIG. 6A is a diagram showing an external appearance of a trocar according to a first modification of the first embodiment
  • FIG. 6B is a diagram showing a configuration of a main part of the trocar according to the first modification of the first embodiment
  • FIG. 7A is a diagram showing an external appearance of a trocar according to a second modification of the first embodiment
  • FIG. 7B is a diagram showing an internal configuration of a main part of the trocar according to the second modification of the first embodiment
  • FIG. 7C is a diagram showing a case in which a power transmission coil unit is attached to a trocar main body portion in FIG. 7B ;
  • FIG. 8A is a diagram showing an external appearance of a trocar according to a third modification of the first embodiment
  • FIG. 8B is a diagram showing an internal configuration of a main part of the trocar according to the third modification of the first embodiment
  • FIG. 9 is a diagram showing a configuration of a main part of a trocar according to a fourth modification of the first embodiment.
  • FIG. 10 is a diagram showing a configuration of a main part of a bipolar electric knife according to a fifth modification of the first embodiment
  • FIG. 11 is a diagram showing a configuration of a main part of a bipolar electric knife according to a sixth modification of the first embodiment
  • FIG. 12A is a diagram showing an external appearance of a bipolar electric knife according to a second embodiment
  • FIG. 12B is a sectional view showing a configuration of an insertion portion of the bipolar electric knife in FIG. 12A ;
  • FIG. 13A is a diagram showing an external appearance of a bipolar electric knife according to a first modification of the second embodiment
  • FIG. 13B is a sectional view showing a configuration of an insertion portion of the bipolar electric knife in FIG. 13A ;
  • FIG. 14 is a sectional view showing a configuration of an insertion portion according to a second modification of the second embodiment
  • FIG. 15 is a sectional view showing a configuration of an insertion portion according to a third modification of the second embodiment
  • FIG. 16 is a sectional view showing a configuration of an insertion portion according to a fourth modification of the second embodiment
  • FIG. 17A is a sectional view showing a configuration of an insertion portion according to a fifth modification of the second embodiment
  • FIG. 17B is a sectional view showing a configuration of an insertion portion according to a sixth modification of the second embodiment
  • FIG. 18A is a diagram showing a configuration of a main part of a bipolar electric knife according to a third embodiment
  • FIG. 18B is a diagram showing a part of an insertion portion of the bipolar electric knife in FIG. 18A in enlargement;
  • FIG. 19A is a diagram showing a configuration of a trocar according to a fourth embodiment.
  • FIG. 19B is a diagram showing an example of an aspect of use of the trocar in FIG. 19A ;
  • FIG. 20 is a diagram showing a configuration of a trocar according to a modification of the fourth embodiment.
  • FIG. 21 is a diagram showing a configuration of a trocar according to a fifth embodiment
  • FIG. 22 is a diagram showing a configuration of a trocar according to a modification of the fifth embodiment.
  • FIG. 23 is a diagram showing a configuration of a trocar according to a sixth embodiment.
  • FIG. 24 is a diagram showing a configuration of a trocar according to a modification of the sixth embodiment.
  • FIG. 25A is a diagram showing an external appearance of a trocar according to a seventh embodiment
  • FIG. 25B is a diagram showing an internal configuration of a main part of the trocar according to the seventh embodiment.
  • FIG. 26A is a diagram showing an external appearance of a trocar according to a first modification of the seventh embodiment
  • FIG. 26B is a diagram showing an internal configuration of a main part of the trocar according to the first modification of the seventh embodiment
  • FIG. 27A is a diagram showing an external appearance of a trocar according to a second modification of the seventh embodiment
  • FIG. 27B is a diagram showing an internal configuration of a main part of the trocar according to the second modification of the seventh embodiment
  • FIG. 28 is a diagram showing a configuration of a power transmission coil unit according to an eighth embodiment.
  • FIG. 29 is a diagram showing an example of a configuration in which a power transmission coil unit capable of resonating in parallel is provided in a trocar;
  • FIG. 30 is a diagram showing an example of a configuration in which a power reception coil unit capable of resonating in parallel is provided in a bipolar electric knife.
  • FIG. 31 is a diagram showing an example of a component that can be incorporated in the power transmission coil unit.
  • FIG. 1A to FIG. 11 relate to a first embodiment of the present invention.
  • FIG. 1A is a diagram showing an external appearance of a trocar according to the first embodiment.
  • FIG. 1B is a diagram showing a configuration of a main part of the trocar according to the first embodiment.
  • a trocar 1 is formed to have a substantially convex shape.
  • the trocar 1 includes an insertion hole 2 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted and a connection terminal portion 3 formed such that a power transmission cable 24 explained below can be detachably connected thereto.
  • a power transmission coil 4 wound along an outer circumference portion of the insertion hole 2 and a power transmission capacitor 5 connected in series to an electric terminal 3 A provided in the connection terminal portion 3 and the power transmission coil 4 are provided.
  • Peripheries of the power transmission coil 4 and the power transmission capacitor 5 on the inside of the trocar 1 are covered with insulating members such as resin. Note that, according to the present embodiment, only a part of the power transmission coil 4 may be configured to be covered with the insulating member such as resin.
  • the power transmission coil 4 is wound to include, on the inside of the trocar 1 and in the outer circumference portion of the insertion hole 2 , a winding axis parallel to an axis in an inserting direction of the insertion hole 2 (hereinafter also referred to as insertion axis) (or coinciding with the insertion axis) and generally cover a vicinity of an opening portion (an upper opening portion) on an inlet side of the insertion hole 2 .
  • insertion axis a winding axis parallel to an axis in an inserting direction of the insertion hole 2
  • One end portion of the power transmission coil 4 is connected to the power transmission capacitor 5 .
  • the other end portion of the power transmission coil 4 is connected to the electric terminal 3 A.
  • inductance of the power transmission coil 4 and capacitance of the power transmission capacitor 5 are respectively set such that the power transmission coil 4 and the power transmission capacitor 5 have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with a series resonance frequency of a power reception coil unit incorporated in a bipolar electric knife 11 explained below.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power transmission coil unit functioning as a series resonance circuit including the power transmission coil 4 and the power transmission capacitor 5 is provided.
  • FIG. 2 is a diagram showing a configuration of a main part of a bipolar electric knife according to the first embodiment.
  • FIG. 3 is a diagram showing a distal end portion of the bipolar electric knife in FIG. 2 in enlargement.
  • a bipolar electric knife 11 includes, at a distal end portion, treatment electrodes 12 capable of applying a high-frequency current for performing treatment such as dissection or coagulation to a living tissue, includes, in a halfway portion, an insertion portion 13 having an elongated shape insertable into the insertion hole 2 of the trocar 1 , and includes, at a rear end portion, an operation portion 14 that enables operation related to opening and closing motions of the treatment electrodes 12 to be manually performed.
  • the bipolar electric knife 11 is configured such that water tightness of an inside of the insertion portion 13 is kept by a cylindrical outer cylinder portion 15 formed by an insulating member such as resin.
  • a cylindrical inner cylinder portion 16 formed by an insulating member such as resin, a power reception coil 17 wound along an outer circumference portion of the inner cylinder portion 16 , a conversion circuit 18 capable of converting a waveform of an alternating current received in the power reception coil 17 into a waveform suitable for treatment (such as dissection or coagulation) and driving the treatment electrodes 12 , and a power reception capacitor 19 connected in series to the power reception coil 17 and the conversion circuit 18 are provided.
  • the power reception coil 17 is wound to include, on the inside of the outer cylinder portion 15 and in the outer circumference portion of the inner cylinder portion 16 , a winding axis parallel to (or coinciding with) a major axis of the insertion portion 13 and generally cover a portion ranging from a vicinity of the treatment electrodes 12 to a vicinity of the operation portion 14 (a portion ranging from a distal end side to a rear end side of the insertion portion 13 ).
  • One end portion of the power reception coil 17 is connected to the power reception capacitor 19 .
  • the other end portion of the power reception coil 17 is connected to the conversion circuit 18 .
  • inductance of the power reception coil 17 and capacitance of the power reception capacitor 19 are respectively set such that the power reception coil 17 and the power reception capacitor: 19 have predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil unit incorporated in the trocar 1 .
  • a power reception coil unit functioning as a series resonance circuit including the power reception coil 17 and the power reception capacitor 19 is provided.
  • FIG. 4 is a diagram showing an example of a state in which the bipolar electric knife is inserted through the trocar.
  • FIG. 5 is a diagram showing a configuration of a main part of the medical wireless power supply system including the trocar and the bipolar electric knife according to the first embodiment.
  • a surgeon or the like punctures a body wall 1001 of a subject with the trocar 1 , connects, using a signal cable 23 , a power supply device 21 that supplies alternating-current power to the trocar 1 and a foot switch 22 capable of outputting an instruction signal for turning on or off power supply from the power supply device 21 to the trocar 1 , and connects the power supply device 21 and the connection terminal portion 3 of the trocar 1 using a power transmission cable 24 .
  • surgeon or the like inserts the bipolar electric knife 11 into a body cavity 1002 of the subject via the trocar 1 set in the body wall 1001 of the subject.
  • the surgeon or the like When the surgeon or the like confirms, for example, through observation of an endoscopic image, visual observation, or the like, that the treatment electrodes 12 reach a vicinity of a treatment target region of the body cavity 1002 , the surgeon or the like operates the foot switch 22 to thereby turn on power supply from the power supply device 21 to the trocar 1 .
  • the power supply device 21 supplies, on the basis of an instruction outputted according to the operation of the foot switch 22 by the surgeon or the like, for example, alternating-current power having a frequency that coincides with a resonance frequency of the power transmission coil unit of the trocar 1 .
  • alternating-current power having a frequency that coincides with a resonance frequency of the power transmission coil unit of the trocar 1 .
  • a magnetic field resonance phenomenon occurs between the power transmission coil unit of the trocar 1 and the power reception coil unit of the bipolar electric knife 11 .
  • Power transmission from the power transmission coil 4 to the power reception coil 17 is performed.
  • the alternating-current power received in the power reception coil 17 is used as driving power for the treatment electrodes 12 .
  • the frequency of the alternating-current power supplied from the power supply device 21 to the trocar 1 may be set to any frequency different from the resonance frequency of the power transmission coil unit of the trocar 1 as long as transmission efficiency equal to or higher than a predetermined value can be secured in the power transmission from the power transmission coil 4 to the power reception coil 17 .
  • the power supply device 21 is not limited to a power supply device including a configuration capable of receiving, via the signal cable 23 connected to the foot switch 22 , an instruction signal for turning on or off the power supply to the trocar 1 . More specifically, the power supply device 21 may be a power supply device including a configuration capable of detecting, for example, when a wireless signal corresponding to operation of a power switch (not shown in the figure) provided in the operation portion 14 is outputted from the bipolar electric knife 11 , on the basis of the wireless signal that the power supply to the trocar 1 is turned on or off
  • the medical wireless power supply system including the trocar 1 and the bipolar electric knife 11
  • the medical wireless power supply system since the medical wireless power supply system is used in the aspect explained above, it is possible to set arrangement positions of the power transmission coil 4 and the power reception coil 17 close to each other and keep directions of the power transmission coil 4 and the power reception coil 17 substantially fixed.
  • the medical wireless power supply system including the trocar 1 and the bipolar electric knife 11 it is possible to perform power supply at relatively high transmission efficiency while making use of the magnetic field resonance phenomenon.
  • FIG. 6A is a diagram showing an external appearance of a trocar according to a first modification of the first embodiment.
  • FIG. 6B is a diagram showing a configuration of a main part of the trocar according to the first modification of the first embodiment.
  • the trocar 31 includes a trocar main body portion 32 A having a substantially convex shape and a box-shaped power transmission coil unit 32 B integrally provided in a side portion of the trocar main body portion 32 A.
  • the trocar main body portion 32 A includes an insertion hole 32 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted.
  • the power transmission coil unit 32 B includes a connection terminal portion 33 formed such that the power transmission cable 24 can be detachably connected thereto.
  • a power transmission coil 34 wound to include a winding axis parallel to an insertion axis of the insertion hole 32 and a power transmission capacitor 35 connected in series to an electric terminal 33 A provided in the connection terminal portion 33 and the power transmission coil 34 are provided.
  • one end portion of the power transmission coil 34 is connected to the power transmission capacitor 35 and the other end portion of the power transmission coil 34 is connected to the electric terminal 33 A.
  • peripheries of the power transmission coil 34 and the power transmission capacitor 35 on the inside of the power transmission coil unit 32 B are covered with insulating members such as resin.
  • inductance of the power transmission coil 34 and capacitance of the power transmission capacitor 35 are respectively set such that the power transmission coil 34 and the power transmission capacitor 35 have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power reception coil unit incorporated in the bipolar electric knife 11 .
  • FIG. 7A is a diagram showing an external appearance of a trocar according to a second modification of the first embodiment.
  • FIG. 7B is a diagram showing an internal configuration of a main part of the trocar according to the second modification of the first embodiment.
  • FIG. 7C is a diagram showing a case in which a power transmission coil unit is attached to a trocar main body portion in FIG. 7B .
  • the trocar 41 includes a trocar main body portion 42 A and a cylindrical power transmission coil unit 42 B detachably attachable to the trocar main body portion 42 A.
  • the trocar main body portion 42 A includes a cylinder portion 42 C including an insertion hole 42 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted and a flange portion 42 D formed along an outer circumference of the cylinder portion 42 C. Further, as shown in FIG.
  • the power transmission coil unit 42 B includes a fitting hole 42 E formed as a hole having a dimension for enabling the cylinder portion 42 C to be inserted through to come into contact with the flange portion 42 D and a connection terminal portion 43 formed such that the power transmission cable 24 can be detachably connected thereto.
  • a power transmission coil 44 wound along an outer circumference portion of the fitting hole 42 E and a power transmission capacitor 45 connected in series to an electric terminal 43 A provided in the connection terminal portion 43 and the power transmission coil 44 are provided on an inside of the power transmission coil unit 42 B.
  • a power transmission coil 44 wound along an outer circumference portion of the fitting hole 42 E and a power transmission capacitor 45 connected in series to an electric terminal 43 A provided in the connection terminal portion 43 and the power transmission coil 44 are provided on an inside of the power transmission coil unit 42 B.
  • a power transmission coil 44 wound along an outer circumference portion of the fitting hole 42 E and a power transmission capacitor 45 connected in series to an electric terminal 43 A provided in the connection terminal portion 43 and the power transmission coil 44 are provided on an inside of the power transmission coil unit 42 B.
  • a power transmission coil 44 wound along an outer circumference portion of the fitting hole 42 E and a power transmission capacitor 45 connected in series to an electric terminal 43 A provided in the connection terminal portion 43 and the power transmission coil 44 are provided on an inside of the power transmission coil unit 42 B.
  • peripheries of the power transmission coil 44 and the power transmission capacitor 45 on the inside of the power transmission coil unit 42 B are covered with insulating members such as resin.
  • the power transmission coil unit 42 B is attached to the trocar main body portion 42 A in an aspect shown in FIG. 7C by inserting the cylinder portion 42 C through the fitting hole 42 E. Since the trocar main body portion 42 A and the power transmission coil unit 42 B are attached in this way, an insertion axis of the insertion hole 42 and a winding axis of the power transmission coil 44 are parallel to each other.
  • the power transmission coil 44 is arranged to be located in a vicinity of an opening portion on an inlet side of the insertion hole 42 .
  • inductance of the power transmission coil 44 and capacitance of the power transmission capacitor 45 are respectively set such that the power transmission coil unit 42 B has a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power reception coil unit incorporated in the bipolar electric knife 11 .
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • the power transmission coil unit 42 B can be attached to the trocar main body portion 42 A (or detached from the trocar main body portion 42 A) and used.
  • FIG. 8A is a diagram showing an external appearance of a trocar according to a third modification of the first embodiment.
  • FIG. 8B is a diagram showing an internal configuration of a main part of the trocar according to the third modification of the first embodiment.
  • the trocar 51 includes a trocar main body portion 52 A and a box-shaped power transmission coil unit 52 B detachably attachable to the trocar main body portion 52 A.
  • the trocar main body portion 52 A includes an insertion hole 52 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted and a groove portion 52 C formed around the insertion hole 52 .
  • the power transmission coil unit 52 B includes a projecting portion 52 D formed to have a shape that can be fit in the groove portion 52 C and a connection terminal portion 53 formed such that the power transmission cable 24 can be detachably connected thereto.
  • a power transmission coil 54 wound to include a winding axis parallel to an insertion axis of the insertion hole 52 when the projecting portion 52 D is fit in the groove portion 52 C (when the power transmission coil unit 52 B is attached to the trocar main body portion 52 A) and a power transmission capacitor 55 connected in, series to an electric terminal 53 A provided in the connection terminal portion 53 and the power transmission coil 54 are provided.
  • one end portion of the power transmission coil 54 is connected to the power transmission capacitor 55 and the other end portion of the power transmission coil 54 is connected to the electric terminal 53 A.
  • inductance of the power transmission coil 54 and capacitance of the power transmission capacitor 55 are respectively set such that the power transmission coil unit 52 B has a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power reception coil unit incorporated in the bipolar electric knife 11 .
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • the power transmission coil unit 52 B can be attached to the trocar main body portion 52 A (or detached from the trocar main body portion 52 A) and used.
  • FIG. 9 is a diagram showing a configuration of a main part of a trocar according to a fourth modification of the first embodiment.
  • the trocar 61 is formed to have a substantially convex shape.
  • the trocar 61 includes an insertion hole 62 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted and a connection terminal portion 63 formed such that the power transmission cable 24 can be detachably connected thereto.
  • a power transmission coil 64 wound along an outer circumference portion of the insertion hole 62 and a power transmission capacitor 65 connected in series to an electric terminal 63 A provided in the connection terminal portion 63 and the power transmission coil 64 are provided.
  • Peripheries of the power transmission coil 64 and the power transmission capacitor 65 on the inside of the trocar 61 are covered with insulating members such as resin.
  • the power transmission coil 64 is wound to include, on the inside of the trocar 61 and in the outer circumference portion of the insertion hole 62 , a winding axis parallel to an insertion axis of the insertion hole 62 and generally cover a portion ranging from a vicinity of an opening portion on an inlet side of the insertion hole 62 to a vicinity of an opening portion (a lower opening portion) on an outlet side.
  • One end portion of the power transmission coil 64 is connected to the power transmission capacitor 65 .
  • the other end portion of the power transmission coil 64 is connected to the electric terminal 63 A.
  • inductance of the power transmission coil 64 and capacitance of the power transmission capacitor 65 are respectively set such that the power transmission coil 64 and the power transmission capacitor 65 have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power reception coil unit incorporated in the bipolar electric knife 11 .
  • a power transmission coil unit functioning as a series resonance circuit including the power transmission coil 64 and the power transmission capacitor 65 is provided.
  • the power transmission coil 64 is provided in the portion ranging from the vicinity of the opening portion on the inlet side of the insertion hole 62 to the vicinity of the opening portion on the outlet side. Therefore, it is easy to improve transmission efficiency in power supply performed making use of the magnetic field resonance phenomenon.
  • FIG. 10 is a diagram showing a configuration of a main part of a bipolar electric knife according to a fifth modification of the first embodiment.
  • the bipolar electric knife 71 includes, at a distal end portion, treatment electrodes 72 capable of applying a high-frequency current for performing treatment such as dissection or coagulation to a living tissue, includes, in a halfway portion, an insertion portion 73 having an elongated shape insertable into the insertion holes of the respective trocars explained above, and includes, at a rear end portion, an operation portion 74 that enables operation related to opening and closing motions of the treatment electrodes 72 to be manually performed.
  • the bipolar electric knife 71 is configured such that water tightness of an inside of the insertion portion 73 is kept by a cylindrical outer cylinder portion 75 formed by an insulating member such as resin.
  • the power reception coil 77 is wound to include, on the inside of the outer cylinder portion 75 and in the outer circumference portion of the inner cylinder portion 76 , a winding axis parallel to a major axis of the insertion portion 73 and generally cover a vicinity of the treatment electrodes 72 .
  • One end portion of the power reception coil 77 is connected to the power reception capacitor 79 .
  • the other end portion of the power reception coil 77 is connected to the conversion circuit 78 .
  • inductance of the power reception coil 77 and capacitance of the power reception capacitor 79 are respectively set such that the power reception coil 77 and the power reception capacitor 79 have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained above.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power reception coil unit functioning as a series resonance circuit including the power reception coil 77 and the power reception capacitor 79 is provided.
  • the power reception coil 77 can be reduced in size (as illustrated in FIG. 10 ). Therefore, it is possible to improve assembly accuracy in manufacturing of the insertion portion 73 .
  • FIG. 11 is a diagram showing a configuration of a main part of a bipolar electric knife according to a sixth modification of the first embodiment.
  • the bipolar electric knife 81 includes, at a distal end portion, treatment electrodes 82 capable of applying a high-frequency current for performing treatment such as dissection or coagulation to a living tissue, includes, in a halfway portion, an insertion portion 83 having an elongated shape insertable into the insertion holes of the respective trocars explained above, and includes, at a rear end portion, an operation portion 84 that enables operation related to opening and closing motions of the treatment electrodes 82 to be manually performed.
  • the bipolar electric knife 81 is configured such that water tightness of an inside of the insertion portion 83 is kept by a cylindrical outer cylinder portion 85 formed by an insulating member such as resin.
  • conductive wires 86 respectively connected to the two treatment electrodes 82 , a power reception coil 87 provided in a vicinity of the operation portion 84 , a conversion circuit 88 capable of converting a waveform of an alternating current received in the power reception coil 87 into a waveform suitable for treatment (such as dissection or coagulation) and outputting the alternating-current to the conductive wires 86 , and a power reception capacitor 89 connected in series to the power reception coil 87 and the conversion circuit 88 are provided.
  • the power reception coil 87 is wound to include, on the inside of the outer cylinder portion 85 and in the vicinity of the operation portion 84 , a winding axis parallel to a major axis of the insertion portion 83 and provided in a position where the power reception coil 87 is arranged near an opening portion on an inlet side of the insertion hole when the insertion portion 83 is inserted through the insertion hole of any one of the respective trocars explained above.
  • One end portion of the power reception coil 87 is connected to the power reception capacitor 89 .
  • the other end portion of the power reception coil 87 is connected to the conversion circuit 88 .
  • inductance of the power reception coil 87 and capacitance of the power reception capacitor 89 are respectively set such that the power reception coil 87 and the power reception capacitor 89 have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained above.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power reception coil unit functioning as a series resonance circuit including the power reception coil 87 and the power reception capacitor 89 is provided.
  • the power reception coil 87 can be increased in size (as illustrated in FIG. 11 ). Therefore, it is possible to easily improve transmission efficiency in power supply performed making use of the magnetic field resonance phenomenon.
  • a medical wireless power supply system including a trocar and a medical instrument such as a bipolar electric knife inserted into the trocar and used
  • a plurality of power transmission capacitors may be provided in the trocar.
  • a series resonance circuit may be formed between one power transmission capacitor selected out of the plurality of power transmission capacitors on the basis of operation of a not-shown switch or the like of the power supply device 21 and the power transmission coil provided in the trocar.
  • FIG. 12A to FIG. 17B relate to a second embodiment of the present invention. Note that, in the present embodiment, detailed explanation concerning portions including configurations and the like same as those in the first embodiment is omitted. Portions including configurations and the like different from those in the first embodiment are mainly explained.
  • FIG. 12A is a diagram showing an external appearance of a bipolar electric knife according to the second embodiment.
  • FIG. 12B is a sectional view showing a configuration of an insertion portion of the bipolar electric knife in FIG. 12A .
  • a bipolar electric knife 91 includes, at a distal end portion, the treatment electrodes 12 capable of applying a high-frequency current for performing treatment such as dissection or coagulation to a living tissue, includes, in a halfway portion, an insertion portion 93 having an elongated shape insertable into the insertion holes of the respective trocars explained in the first embodiment, and includes, at a rear end portion, the operation portion 14 that enables operation related to opening and closing motions of the treatment electrodes 12 to be manually performed.
  • the bipolar electric knife 91 is configured such that water tightness of an inside of the insertion portion 93 is kept by an outer cylinder portion 95 including a substantially cylindrical tube portion 95 A formed by a conductive member such as stainless steel and provided with a notch along a major axis direction and an insulating portion 95 B formed by an insulating member such as resin and provided to fill a space of a notch portion of the tube portion 95 A.
  • a cylindrical inner cylinder portion 96 formed by an insulating member such as resin and a power reception coil 97 wound along an outer circumference portion of the inner cylinder portion 96 are provided.
  • a conversion circuit (same as the conversion circuit in the first embodiment) capable of converting a waveform of an alternating current received in the power reception coil 97 into a waveform suitable for treatment (such as dissection or coagulation) and driving the treatment electrodes 12 and a power reception capacitor (same as the power reception capacitor in the first embodiment) connected in series to the power reception coil 97 and the conversion circuit are provided.
  • the power reception coil 97 in the present embodiment includes a winding state and a connection state same as the states of any one of the power reception coils 17 , 77 , and 87 .
  • inductance of the power reception coil 97 and capacitance of the not-shown power reception capacitor are respectively set such that the power reception coil 97 and the not-shown power reception capacitor have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained in the first embodiment.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power reception coil unit substantially the same as the power reception coil unit in the first embodiment including the power reception coil 97 and the not-shown power reception capacitor is provided.
  • the bipolar electric knife 91 including the configuration explained above, it is possible to perform wireless power supply making use of the magnetic field resonance phenomenon while forming the tube portion 95 A of the outer cylinder portion 95 with a member having relatively high strength such as stainless steel.
  • FIG. 13A is a diagram showing an external appearance of a bipolar electric knife according to a first modification of the second embodiment.
  • FIG. 13B is a sectional view showing a configuration of an insertion portion of the bipolar electric knife in FIG. 13A .
  • the bipolar electric knife 101 includes, at a distal end portion, the treatment electrodes 12 capable of applying a high-frequency current for performing treatment such as dissection or coagulation to a living tissue, includes, in a halfway portion, an insertion portion 103 having an elongated shape insertable into the insertion holes of the respective trocars explained in the first embodiment, and includes, at a rear end portion, the operation portion 14 that enables operation related to opening and closing motions of the treatment electrodes 12 to be manually performed.
  • the bipolar electric knife 101 is configured such that water tightness of an inside of the insertion portion 103 is kept by an outer cylinder portion 105 including a substantially cylindrical tube portion 105 A formed by winding a conductive member such as stainless steel in a swirl shape (or a spiral shape) and an insulating portion 105 B provided to fill a space formed between overlapping portions of the conductive member of the tube portion 105 A.
  • an outer cylinder portion 105 including a substantially cylindrical tube portion 105 A formed by winding a conductive member such as stainless steel in a swirl shape (or a spiral shape) and an insulating portion 105 B provided to fill a space formed between overlapping portions of the conductive member of the tube portion 105 A.
  • a cylindrical inner cylinder portion 106 formed by an insulating member such as resin and a power reception coil 107 wound along an outer circumference portion of the inner cylinder portion 106 are provided.
  • a conversion circuit (same as the conversion circuit in the first embodiment) capable of converting a waveform of an alternating current received in the power reception coil 107 into a waveform suitable for treatment (such as dissection or coagulation) and driving the treatment electrodes 12 and a power reception capacitor (same as the power reception capacitor in the first embodiment) connected in series to the power reception coil 107 and the conversion circuit are provided.
  • the power reception coil 107 in the present embodiment includes a winding state and a connection state same as the states of any one of the power reception coils 17 , 77 , and 87 .
  • inductance of the power reception coil 107 and capacitance of the not-shown power reception capacitor are respectively set such that the power reception coil.
  • 107 and the not-shown power reception capacitor have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained in the first embodiment.
  • a power reception coil unit substantially the same as the power reception coil unit in the first embodiment including the power reception coil 107 and the not-shown power reception capacitor is provided.
  • bipolar electric knife 101 including the configuration explained above, it is possible to perform wireless power supply making use of the magnetic field resonance phenomenon while increasing strength and water tightness of the outer cylinder portion 105 .
  • an insertion portion of a bipolar electric knife may be configured by an insertion portion 113 including a configuration shown in FIG. 14 .
  • FIG. 14 is a sectional view showing a configuration of an insertion portion according to a second modification of the second embodiment.
  • the insertion portion 113 is configured such that water tightness on an inside is kept by a cylindrical outer cylinder portion 115 formed by an insulating member such as resin.
  • an inner cylinder portion 116 including a substantially cylindrical tube portion 116 A formed by a conductive member such as stainless steel and provided with a notch along a major axis direction and an insulating portion 116 B formed by an insulating member such as resin and provided to fill a space of a notch portion of the tube portion 116 A is provided.
  • a power reception coil 117 wound along an outer circumference portion of the inner cylinder portion 116 is provided.
  • a conversion circuit (same as the conversion circuit in the first embodiment) capable of converting a waveform of an alternating current received in the power reception coil 117 into a waveform suitable for treatment (such as dissection or coagulation) and driving the treatment electrodes 12 and a power reception capacitor (same as the power reception capacitor in the first embodiment) connected in series to the power reception coil 117 and the conversion circuit are provided.
  • the power reception coil 117 in the present embodiment includes a winding state and a connection state same as the states of any one of the power reception coils 17 , 77 , and 87 .
  • inductance of the power reception coil 117 and capacitance of the not-shown power reception capacitor are respectively set such that the power reception coil 117 and the not-shown power reception capacitor have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained in the first embodiment.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power reception coil unit substantially the same as the power reception coil unit in the first embodiment including the power reception coil 117 and the not-shown power reception capacitor is provided.
  • an insertion portion of a bipolar electric knife may be configured by an insertion portion 123 including a configuration shown in FIG. 15 .
  • FIG. 15 is a sectional view showing a configuration of an insertion portion according to a third modification of the second embodiment.
  • the insertion portion 123 is configured such that water tightness on an inside is kept by a cylindrical outer cylinder portion 125 formed by an insulating member such as resin.
  • an inner cylinder portion 126 including a substantially cylindrical tube portion 126 A formed by winding a conductive member such as stainless steel in a swirl shape (or a spiral shape) and an insulating portion 126 B provided to fill a space formed between overlapping portions of the conductive member of the tube portion 126 A is provided.
  • a conductive member such as stainless steel in a swirl shape (or a spiral shape)
  • an insulating portion 126 B provided to fill a space formed between overlapping portions of the conductive member of the tube portion 126 A is provided.
  • a power reception coil 127 wound along an outer circumference portion of the inner cylinder portion 126 is provided.
  • a conversion circuit (same as the conversion circuit in the first embodiment) capable of converting a waveform of an alternating current received in the power reception coil 127 into a waveform suitable for treatment (such as dissection or coagulation) and driving the treatment electrodes 12 and a power reception capacitor (same as the power reception capacitor in the first embodiment) connected in series to the power reception coil 127 and the conversion circuit are provided.
  • the power reception coil 127 in the present embodiment includes a winding state and a connection state same as the states of any one of the power reception coils 17 , 77 , and 87 .
  • inductance of the power reception coil 127 and capacitance of the not-shown power reception capacitor are respectively set such that the power reception coil 127 and the not-shown power reception capacitor have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained in the first embodiment.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power reception coil unit substantially the same as the power reception coil unit in the first embodiment including the power reception coil 127 and the not-shown power reception capacitor is provided.
  • FIG. 16 is a sectional view showing a configuration of an insertion portion according to a fourth modification of the second embodiment.
  • FIG. 17A is a sectional view showing a configuration of an insertion portion according to a fifth modification of the second embodiment.
  • a high conductive layer 95 D formed of copper or the like having high conductivity compared with the tube portion 95 A is laminated on an inner circumference of a layer of the tube portion 95 A.
  • the laminated tube portion 145 A has a substantially cylindrical shape in which a notch is provided along a major axis direction.
  • the insulating portion 145 B is formed by an insulating member such as resin and provided to fill a space in a notch portion of the laminated tube portion 145 A.
  • FIG. 17B is a sectional view showing a configuration of an insertion portion according to a sixth modification of the second embodiment.
  • a high conductive layer 95 E formed of copper or the like having high conductivity compared with the tube portion 95 A is laminated to cover an inner circumferential surface and an outer circumferential surface of the layer of the tube portion 95 A.
  • the laminated tube portion 155 A has a substantially cylindrical shape in which a notch is provided along a major axis direction.
  • the insulating portion 155 B is formed by an insulating member such as resin and provided to fill a space in a notch portion of the laminated tube portion 155 A.
  • the medical instrument such as the bipolar electric knife is not limited to the medical instrument including the insertion portion in which the insulating portion is provided only in one place of the outer cylinder and (or) the inner cylinder.
  • the medical instrument may be, for example, a medical instrument including an insertion portion in which insulating portions are provided in a plurality of places in an outer cylinder portion and (or) an inner cylinder portion.
  • FIG. 18A and FIG. 18B relate to a third embodiment of the present invention.
  • FIG. 18A is a diagram showing a configuration of a main part of a bipolar electric knife according to the third embodiment.
  • FIG. 18B is a sectional view showing a part of an insertion portion of the bipolar electric knife in FIG. 18A in enlargement.
  • a bipolar electric knife 161 includes, at a distal end portion, treatment electrodes 162 capable of applying a high-frequency current for performing treatment such as dissection or coagulation to a living tissue, includes, in a halfway portion, an insertion portion 163 having an elongated shape insertable into the insertion holes of the respective trocars explained above, and includes, at a rear end portion, an operation portion 164 that enables operation related to opening and closing motions of the treatment electrodes 162 to be manually performed.
  • the bipolar electric knife 161 is configured such that water tightness of an inside of the insertion portion 163 is kept by a cylindrical outer cylinder portion 165 formed by an insulating member such as resin.
  • one or a plurality of relay coil units 166 A are provided on the inside of the outer cylinder portion 165 and in the outer circumference portion of the inner cylinder portion 166 .
  • Each of the relay coil units 166 A includes one set of a relay coil 166 B and a relay capacitor 166 C connected in series.
  • the relay coil 166 B of the relay coil unit 166 A is wound along the outer circumference portion of the inner cylinder portion 166 to include a winding axis parallel to a major axis of the insertion portion 163 . (Note that, as shown in FIG. 18B , when the plurality of relay coil units 166 A are provided, the relay coil units 166 A are arranged to be spaced apart from one another.)
  • the power reception coil 167 is wound to include, on the inside of the outer cylinder portion 165 and in the outer circumference portion of the inner cylinder portion 166 , a winding axis parallel to a major axis of the insertion portion 163 and generally cover a vicinity of the treatment electrodes 162 .
  • One end portion of the power reception coil 167 is connected to the power reception capacitor 169 .
  • the other end portion of the power reception coil 167 is connected to the conversion circuit 168 .
  • inductance of the power reception coil 167 and capacitance of the power reception capacitor 169 are respectively set such that the power reception coil 167 and the power reception capacitor 169 have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained in the first embodiment.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power reception coil unit functioning as a series resonance circuit including the power reception coil 167 and the power reception capacitor 169 is provided.
  • inductance of the relay coil 166 B and capacitance of the relay capacitor 166 C are respectively set such that the relay coil 166 B and the relay capacitor 166 C have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power transmission coil units incorporated in the respective trocars explained in the first embodiment and the series resonance frequency of the power reception coil unit including the power reception coil 167 and the power reception capacitor 169 .
  • a predetermined series resonance frequency e.g., 13.56 MHz
  • the bipolar electric knife 161 when power transmission is performed from any one of the trocars explained in the first embodiment, it is possible to transmit electric power to the power reception coil unit including the power reception coil 167 and the power reception capacitor 169 via any relay coil unit 166 A.
  • the relay coil 166 B and the power reception coil 167 can be reduced in size. Therefore, it is possible to improve assembly accuracy in manufacturing of the insertion portion 163 .
  • FIG. 19A , FIG. 19B , and FIG. 20 relate to a fourth embodiment of the present invention.
  • FIG. 19A is a diagram showing a configuration of a trocar according to the fourth embodiment.
  • FIG. 19B is a diagram showing an example of an aspect of use of the trocar shown in FIG. 19A .
  • a trocar 171 A is configured by providing a plurality of notch portions 172 A around the insertion hole 2 of an armor portion of the trocar 1 explained in the first embodiment.
  • Conductive plates 173 A explained below are detachably attachable to the plurality of notch portions 172 A.
  • the plurality of notch portions 172 A are formed to respectively have shapes capable of holding the attached conductive plates 173 A.
  • the trocar 171 A in the present embodiment is configured assuming that the trocar 171 A is used simultaneously with a trocar 171 B, a resonance frequency of a power transmission coil unit of which is set the same as a resonance frequency of a power transmission coil unit of the trocar 171 A.
  • the trocar 171 A when being used simultaneously with the trocar 171 B, the trocar 171 A is used in a state in which the conductive plate 173 A is attached to the notch portion 172 A closest to the trocar 171 B.
  • the trocar 171 B when being used simultaneously with the trocar 171 A, the trocar 171 B is used in a state in which a conductive plate 173 B is attached to a notch portion 172 B closest to the trocar 171 A.
  • the conductive plate 173 A is formed as a tabular partition member having sufficiently large width and height with respect to a diameter and height of a power transmission coil included in the power transmission coil unit incorporated in the trocar 171 A.
  • the conductive plate 173 B is configured as a tabular member having sufficiently large width and height with respect to a diameter and height of a power transmission coil included in the power transmission coil unit incorporated in the trocar 171 B.
  • the trocar 171 A is used in a state in which the conductive plate 173 A explained above is set, whereby it is possible to suppress a leak of a magnetic field to the trocar 171 B side.
  • the trocar 171 B is used in a state in which the conductive plate 173 B is set, whereby it is possible to suppress a leak of a magnetic field to the trocar 171 A side.
  • the trocar is not limited to the trocar including the configuration like the trocars 171 A and 171 B and may include, for example, a configuration like a trocar 181 in FIG. 20 .
  • FIG. 20 is a diagram showing a configuration of a trocar according to a modification of the fourth embodiment.
  • the trocar 181 is configured by providing a conductive plate 182 around the power transmission coil 4 on the inside of the trocar 1 explained in the first embodiment.
  • the conductive plate 182 is formed as a partition member having sufficiently large height with respect to height of the power transmission coil 4 incorporated in the trocar 181 and capable of generally covering the outer circumference portion of the power transmission coil 4 in positions respectively not in contact with the respective portions of the power transmission coil 4 and the power transmission capacitor 5 .
  • the conductive plate 182 may be formed in a C shape including a notch shown in FIG. 20 or may be formed to be provided with the insulating member shown in FIG. 12A and FIG. 12B as long as the conductive plate 182 includes an insulating portion in a part of an outer circumference thereof.
  • not-shown insulating members are provided around the electric terminal 3 A and the power transmission capacitor 5 , whereby the electric terminal 3 A and the power transmission capacitor 5 are electrically insulated from the conductive plate 182 .
  • FIG. 21 and FIG. 22 relate to a fifth embodiment of the present invention.
  • FIG. 21 is a diagram showing a configuration of a trocar according to the fifth embodiment.
  • a trocar 191 is configured by providing an inner cylinder portion 192 around the insertion hole 2 on the inside of the trocar 1 and on the inner side of the power transmission coil 4 explained in the first embodiment.
  • the inner cylinder portion 192 is provided in a portion ranging from a vicinity of the power transmission coil 4 to an opening portion on an outlet side of the insertion hole 2 .
  • the inner cylinder portion 192 includes a substantially cylindrical tube portion 192 A formed by a conductive member such as copper and provided with a notch along a major axis direction and an insulating portion 192 B formed by an insulating member such as resin and provided to fill a space of a notch portion of the tube portion 192 A.
  • the insulating portion 192 B is not limited to an insulating portion formed by the insulating member such as resin and may be a space itself of the notch portion of the tube portion 192 A.
  • trocar 191 including the configuration explained above, it is easy to improve transmission efficiency in power supply performed making use of the magnetic field resonance phenomenon.
  • the trocar is not limited to the trocar including the configuration like the trocar 191 and may include, for example, a configuration like a trocar 201 in FIG. 22 .
  • FIG. 22 is a diagram showing a configuration of a trocar according to a modification of the fifth embodiment.
  • the trocar 201 is configured by providing an outer cylinder portion 202 around the insertion hole 2 on the inside of the trocar 1 and on the outer side of the power transmission coil 4 explained in the first embodiment.
  • the outer cylinder portion 202 is provided in a portion ranging from the vicinity of the power transmission coil 4 to the opening portion on the outlet side of the insertion hole 2 .
  • the outer cylinder portion 202 includes a substantially cylindrical tube portion 202 A formed by a conductive member such as copper and provided with a notch along a major axis direction and an insulating portion 202 B formed by an insulating member such as resin and provided to fill a space of a notch portion of the tube portion 202 A.
  • the insulating portion 202 B is not limited to the insulating portion formed by the insulating member such as resin and may be a space itself of the notch portion of the tube portion 202 A.
  • a part of a wire in connecting the electric terminal 3 A, the power transmission coil 4 , and the power transmission capacitor 5 in series is provided to pierce through the insulating portion 202 B and not to be in contact with the tube portion 202 A.
  • the trocar 201 including the configuration explained above, it is easy to improve transmission efficiency in power supply performed making use of the magnetic field resonance phenomenon.
  • the inner cylinder portion 192 may be formed to include a configuration substantially the same as the configuration of the inner cylinder portion 126 in the second embodiment.
  • the outer cylinder portion 202 may be formed to include a configuration substantially the same as the configuration of the outer cylinder portion 105 in the second embodiment.
  • the inner cylinder portion 192 in the present embodiment may include a plurality of insulating portions 192 B.
  • the outer cylinder portion 202 in the present embodiment may include a plurality of insulating portions 202 B.
  • FIG. 23 and FIG. 24 relate to a sixth embodiment of the present invention.
  • FIG. 23 is a diagram showing a configuration of a trocar according to the sixth embodiment.
  • a trocar 211 includes an insertion hole 212 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted and connection terminal portions 213 M and 213 N respectively formed such that the power transmission cable 24 can be detachably connected thereto.
  • a power transmission coil 214 M wound along an outer circumference portion of the insertion hole 212 and a power transmission capacitor 215 M connected in series to an electric terminal 213 A provided in the connection terminal portion 213 M and the power transmission coil 214 M are provided.
  • Peripheries of the power transmission coil 214 M and the power transmission capacitor 215 M on the inside of the trocar 211 are covered with insulating members such as resin.
  • the power transmission coil 214 M is wound to include, on the inside of the trocar 211 and in the outer circumference portion of the insertion hole 212 , a winding axis parallel to an insertion axis of the insertion hole 212 and generally cover a portion close to an opening portion on an inlet side of the insertion hole 212 compared with a power transmission coil 214 N explained below.
  • One end portion of the power transmission coil 214 M is connected to the power transmission capacitor 215 M.
  • the other end portion of the power transmission coil 214 M is connected to the electric terminal 213 A.
  • inductance of the power transmission coil 214 M and capacitance of the power transmission capacitor 215 M are respectively set such that the power transmission coil 214 M and the power transmission capacitor 215 M have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power reception coil units incorporated in the respective bipolar electric knives explained in the second embodiment and the like.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power transmission coil 214 N wound along the outer circumference portion of the insertion hole 212 and a power transmission capacitor 215 N connected in series to an electric terminal 213 B provided in the connection terminal portion 213 N and the power transmission coil 214 N are provided.
  • Peripheries of the power transmission coil 214 N and the power transmission capacitor 215 N on the inside of the trocar 211 are covered with insulating members such as resin.
  • the power transmission coil 214 N is wound to include, on the inside of the trocar 211 and in the outer circumference portion of the insertion hole 212 , a winding axis parallel to the insertion axis of the insertion hole 212 and generally cover a portion away from the opening portion on the inlet side of the insertion hole 212 compared with the power transmission coil 214 M.
  • One end portion of the power transmission coil 214 N is connected to the power transmission capacitor 215 N.
  • the other end portion of the power transmission coil 214 N is connected to the electric terminal 213 B.
  • inductance of the power transmission coil 214 N and capacitance of the power transmission capacitor 215 N are respectively set such that the power transmission coil 214 N and the power transmission capacitor 215 N have a series resonance frequency (e.g., 10 MHz) different from the series resonance frequency set by the power transmission coil 214 M and the power transmission capacitor 215 M.
  • two power transmission coil units i.e., a power transmission coil unit including the power transmission coil 214 M and the power transmission capacitor 215 M and a power transmission coil unit including the power transmission coil 214 N and the power transmission capacitor 215 N are provided along the insertion axis of the insertion portion 212 .
  • a medical instrument that performs power supply making use of the magnetic field resonance phenomenon can be used while being selected out of two medical instruments in which series resonance frequencies of power reception coil units are set to be different from each other.
  • connection terminal portions 213 M and 213 N may be arranged in positions close to each other as long as the electric terminals 213 A and 213 B are electrically separated from each other.
  • the trocar is not limited to the trocar including the configuration like the trocar 211 and may include, for example, a configuration like a trocar 221 in FIG. 24 .
  • FIG. 24 is a diagram showing a configuration of a trocar according to a modification of the sixth embodiment.
  • the trocar 221 includes an insertion hole 222 formed as a hole having a dimension for enabling a treatment instrument and the like to be inserted and connection terminal portions 223 M and 223 N respectively formed such that the power transmission cable 24 can be detachably connected thereto.
  • Peripheries of the power transmission coil 224 M and the power transmission capacitor 225 M on the inside of the trocar 221 are covered with insulating members such as resin.
  • the power transmission coil 224 M is wound to include, on the inside of the trocar 221 and in the outer circumference portion of the insertion hole 222 , a winding axis parallel to an insertion axis of the insertion hole 222 and generally cover a part of the: insertion hole 222 .
  • One end portion of the power transmission coil 224 M is connected to the power transmission capacitor 225 M.
  • the other end portion of the power transmission coil 224 M is connected to the electric terminal 223 A.
  • inductance of the power transmission coil 224 M and capacitance of the power transmission capacitor 225 M are respectively set such that the power transmission coil 224 M and the power transmission capacitor 225 M have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with a series resonance frequency of the power reception coil units incorporated in the respective bipolar electric knives explained in the second embodiment and the like.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power transmission coil 224 N wound along the outer circumference portion of the insertion hole 222 and a power transmission capacitor 225 N connected in series to an electric terminal 223 B provided in the connection terminal portion 223 N and the power transmission coil 224 N are provided.
  • Peripheries of the power transmission coil 224 N and the power transmission capacitor 225 N on the inside of the trocar 221 are covered with insulating members such as resin.
  • the power transmission coil 224 N is wound to include, on the inside of the trocar 221 and in the outer circumference portion of the power transmission coil 224 M, a winding axis parallel to the insertion axis of the insertion hole 222 .
  • One end portion of the power transmission coil 224 N is connected to the power transmission capacitor 225 N.
  • the other end portion of the power transmission coil 224 N is connected to the electric terminal 223 B.
  • inductance of the power transmission coil 224 N and capacitance of the power transmission capacitor 225 N are respectively set such that the power transmission coil 224 N and the power transmission capacitor 225 N have a series resonance frequency (e.g., 10 MHz) different from the series resonance frequency set by the power transmission coil 224 M and the power transmission capacitor 225 M.
  • two power transmission coil units i.e., a power transmission coil unit including the power transmission coil 224 M and the power transmission capacitor 225 M and a power transmission coil unit including the power transmission coil 224 N and the power transmission capacitor 225 N are provided to doubly surround a part of the outer circumference portion of the insertion hole 222 .
  • a medical instrument that performs power supply making use of the magnetic field resonance phenomenon can be used while being selected out of two medical instruments in which series resonance frequencies of power reception coil units are set to be different from each other.
  • connection terminal portions 223 M and 223 N may be arranged in positions close to each other as long as the electric terminals 223 A and 223 B are electrically separated from each other.
  • the trocars 211 and 221 are not limited to the trocar including the configuration explained above.
  • the trocars 211 and 221 may be configured by providing one power transmission coil unit in the trocar main body portion 32 A and providing the other power transmission coil unit in the power transmission coil unit 32 B.
  • FIG. 25A to FIG. 27B relate to a seventh embodiment of the present invention.
  • FIG. 25A is a diagram showing an external appearance of a trocar according to the seventh embodiment.
  • FIG. 25B is a diagram showing an internal configuration of a main part of the trocar according to the seventh embodiment.
  • a trocar 231 is configured to make it possible to simultaneously insert a plurality of medical instruments from one incised wound formed on a body wall of a subject and use the medical instruments.
  • the trocar 231 includes three insertion hole portions 231 A and a cylinder portion 231 B formed to communicate with each of opening portions (not shown in the figure) on outlet sides of insertion holes 232 provided one each in each of the insertion hole portions 231 A.
  • the insertion holes 232 formed as holes having a dimension for enabling a treatment instrument and the like to be inserted and connection terminal portions 233 formed such that the power transmission cable 24 can be detachably connected thereto are provided.
  • Peripheries of the power transmission coils 234 and the power transmission capacitors 235 on the insides of the respective insertion hole portions 231 A are covered with insulating members such as resin.
  • the power transmission coils 234 are wound to include, on the insides of the insertion hole portions 231 A and the outer circumference portions of the insertion holes 232 , winding axes parallel to insertion axes of the insertion holes 232 .
  • One end portions of the power transmission coils 234 are connected to the power transmission capacitors 235 .
  • the other end portions of the power transmission coils 234 are connected to the electric terminals 233 A.
  • inductance of the power transmission coils 234 and capacitance of the power transmission capacitors 235 are respectively set such that the power transmission coils 234 and the power transmission capacitors 235 have a different series resonance frequency for each of the insertion hole portions 231 A. More specifically, for example, in a first insertion hole portion 231 A among the three insertion hole portions 231 A, inductance of the power transmission coil 234 and capacitance of the power transmission capacitor 235 are set such that the power transmission coil 234 and the power transmission capacitor 235 have a first resonance frequency (e.g., 13.56 MHz).
  • a first resonance frequency e.g. 13.56 MHz
  • inductance of the power transmission coil 234 and capacitance of the power transmission capacitor 235 are set such that the power transmission coil 234 and the power transmission capacitor 235 have a second resonance frequency (e.g., 10 MHz).
  • inductance of the power transmission coil 234 and capacitance of the power transmission capacitor 235 are set such that the power transmission coil 234 and the power transmission capacitor 235 have a third resonance frequency (e.g., 15 MHz).
  • a first power transmission coil unit configured to resonate at the first resonance frequency is provided on an inside of the first insertion hole portion 231 A.
  • a second power transmission coil unit configured to resonate at the second resonance frequency is provided on an inside of the second insertion hole portion 231 A.
  • a third power transmission coil unit configured to resonate at the third resonance frequency is provided on an inside of the third insertion hole portion 231 A.
  • the insertion hole portions 231 A may be arranged in positions where the respective electric terminals 233 A are close to one another.
  • the trocar is not limited to the trocar including the configuration like the trocar 231 and may include, for example, a configuration like a trocar 241 in FIG. 26A and FIG. 26B .
  • FIG. 26A is a diagram showing an external appearance of a trocar according to a first modification of the seventh embodiment.
  • FIG. 26B is a diagram showing an internal configuration of a main part of the trocar according to the first modification of the seventh embodiment.
  • the trocar 241 is configured to make it possible to simultaneously insert a plurality of medical instruments from one incised wound formed on a body wall of a subject and use the medical instruments.
  • the trocar 241 includes three insertion hole portions 241 A, a cylinder portion 241 B formed to communicate with each of opening portions (not shown in the figure) on outlet sides of insertion holes 242 provided one each in each of the insertion hole portions 241 A, and a ring portion 241 C formed to annularly surround outer circumferential sides of the respective insertion hole portions 241 A.
  • the insertion holes 242 formed as holes having a dimension for enabling a treatment instrument and the like to be inserted are provided.
  • connection terminal portion 243 formed such that the power transmission cable 24 can be detachably connected thereto is provided on a side surface of the ring portion 241 C.
  • a power transmission coil 244 M wound to cover parts of outer circumference portions of the respective insertion holes 232 , an electric connection member 246 M connected to an electric terminal 243 A of the connection terminal portion 243 , and a power transmission capacitor 245 M connected in series to the electric connection member 246 M and the power transmission coil 244 M are provided.
  • Peripheries of the power transmission coil 244 M and the power transmission capacitor 245 M on the inside of the ring portion 241 C are covered with insulating members such as resin.
  • the power transmission coil 244 M is wound to include, on the inside of the ring portion 241 C and in the outer circumference portions of the respective insertion holes 222 , a winding axis parallel to insertion axes of the respective insertion holes 242 .
  • One end portion of the power transmission coil 244 M is connected to the power transmission capacitor 245 M.
  • the other end portion of the power transmission coil 244 M is connected to the electric connection member 246 M.
  • inductance of the power transmission coil 244 M and capacitance of the power transmission capacitor 245 M are respectively set such that the power transmission coil 244 M and the power transmission capacitor 245 M have a predetermined series resonance frequency (e.g., 13.56 MHz) that coincides with the series resonance frequency of the power reception coil units incorporated in the respective bipolar electric knives explained in the second embodiment and the like.
  • a predetermined series resonance frequency e.g. 13.56 MHz
  • a power transmission coil 244 N wound to cover parts of the outer circumference portions of the respective insertion holes 232 , an electric connection member 246 N connected to the electric terminal 243 A of the connection terminal portion 243 , and a power transmission capacitor 245 N connected in series to the electric connection member 246 N and the power transmission coil 244 N are provided.
  • peripheries of the power transmission coil 244 N and the power transmission capacitor 245 N on the inside of the ring portion 241 C are covered with insulating members such as resin.
  • the power transmission coil 244 N is wound to include, on the inside of the ring portion 241 C and in an outer circumference portion of the power transmission coil 244 M, a winding axis parallel to the insertion axes of the respective insertion holes 242 .
  • One end portion of the power transmission coil 244 N is connected to the power transmission capacitor 245 N.
  • the other end portion of the power transmission coil 244 N is connected to the electric connection member 246 N.
  • inductance of the power transmission coil 244 N and capacitance of the power transmission capacitor 245 N are respectively set such that the power transmission coil 244 N and the power transmission capacitor 245 N have a series resonance frequency (e.g., 10 MHz) different from the series resonance frequencies set by the power transmission coil 244 M and the power transmission capacitor 245 M.
  • two power transmission coil units i.e., a power transmission coil unit including the power transmission coil 244 M and the power transmission capacitor 245 M and a power transmission coil unit including the power transmission coil 244 N and the power transmission capacitor 245 N are provided to doubly surround a part of the outer circumference portions of the respective insertion holes 242 .
  • the trocar is not limited to the trocar including the configuration like the trocar 231 or 241 and may include, for example, a configuration like a trocar 251 in FIG. 27A and FIG. 27B .
  • FIG. 27A is a diagram showing an external appearance of a trocar according to a second modification of the seventh embodiment.
  • FIG. 27B is a diagram showing an internal configuration of a main part of the trocar according to the second modification of the seventh embodiment.
  • the trocar 251 is configured to make it possible to simultaneously insert a plurality of medical instruments from one incised wound formed on a body wall of a subject and use the medical instruments.
  • the trocar 251 includes three insertion hole portions 251 A and a cylinder portion 251 B formed to communicate with each of opening portions (not shown in the figure) on outlet sides of the respective insertion holes 252 provided one each in each of the insertion hole portions 251 A.
  • insertion holes 252 formed as holes having a dimension for enabling a treatment instrument and the like to be inserted and connection terminal portions 253 formed such that the power transmission cable 24 can be detachably connected thereto are provided.
  • Peripheries of the power transmission coils 254 and the power transmission capacitors 255 on the insides of the respective insertion hole portions 251 A are covered with insulating members such as resin.
  • the power transmission coils 254 are wound to include, on the insides of the insertion hole portions 251 A and the outer circumference portions of the insertion holes 252 , winding axes parallel to insertion axes of the insertion holes 252 .
  • One end portions of the power transmission coils 254 are connected to the power transmission capacitors 255 .
  • the other end portions of the power transmission coils 254 are connected to the electric terminals 253 A.
  • the conductive plates 256 are formed as partition members having sufficiently large height with respect to height of the power transmission coils 254 and capable of generally covering the outer circumference portions of the power transmission coils 254 in positions respectively not in contact with the respective portions of the electric terminals 253 A, the power transmission coils 254 and the power transmission capacitors 255 .
  • the conductive plates 256 may be formed in a C shape including a notch shown in FIG. 27B as long as parts of outer circumferences of the conductive plates 256 include insulating portions.
  • the conductive plates 256 may be formed with the insulating member shown in FIG. 12A and. FIG. 12B provided therein.
  • inductance of the power transmission coils 234 and capacitance of the power transmission capacitors 235 can be respectively set such that the respective insertion hole portions 251 A have a same series resonance frequency. More specifically, for example, in the respective insertion hole portions 251 A, inductance of the power transmission coils 254 and capacitance of the power transmission capacitors 255 can be respectively set such that the power transmission coils 254 and the power transmission capacitors 255 have a predetermined resonance frequency (e.g., 13.56 MHz).
  • a predetermined resonance frequency e.g., 13.56 MHz
  • power transmission coil units configured to resonate at a predetermined resonance frequency can be provided on the insides of the respective insertion hole portions 251 A.
  • the trocar 251 it is also possible to set the power transmission coil units of two insertion hole portions 251 A among the respective insertion hole portions 251 A to a first resonance frequency and set a resonance frequency of the power transmission coil unit of the remaining one insertion hole portion 251 A to a second resonance frequency different from the first resonance frequency.
  • the insertion hole portions 251 A may be arranged in positions where the respective electric terminals 253 A are close to one another.
  • FIG. 28 relates to an eighth embodiment of the present invention.
  • FIG. 28 is a diagram showing a configuration of a power transmission coil unit according to the eighth embodiment.
  • the power transmission coil unit in the present embodiment is configured by connecting in series an intra-trocar power transmission coil 264 A incorporated in a trocar 261 , an intra-bed power transmission coil 264 B incorporated in a bed 271 on which a subject to be treated with a medical instrument such as a bipolar electric knife can be laid, a power transmission capacitor 265 , and an electric connection member 266 .
  • the intra-trocar power transmission coil 264 A and the intra-bed power transmission coil 264 B are wound and connected such that generating directions of magnetic fields coincide with each other (or are not reversed).
  • inductance of the intra-trocar power transmission coil 264 A, inductance of the intra-bed power transmission coil 264 B, and capacitance of the power transmission capacitor 265 are respectively set such that the power transmission coil unit has a predetermined resonance frequency (e.g., 13.56 MHz).
  • the power transmission coil unit including the configuration explained above, it is possible to generate a magnetic field in a wide range when power supply is performed making use of the magnetic field resonance phenomenon.
  • the coil unit including the coil and the capacitor electrically connected in series is not limitedly configured to resonate in series.
  • a coil unit including a coil and a capacitor electrically connected in parallel may be configured to resonate in parallel.
  • FIG. 29 is a diagram showing an example of a configuration in a case in which a power transmission coil unit capable of resonating in parallel is provided in a trocar.
  • FIG. 30 is a diagram showing an example of a configuration in a case in which a power reception coil unit capable of resonating in parallel is provided in a bipolar electric knife
  • a power transmission coil unit may be provided in which the power transmission coil 4 and the power transmission capacitor 5 are connected to the electric terminal 3 A electrically in parallel and inductance of the power transmission coil 4 and capacitance of the power transmission capacitor 5 are respectively set such that the power transmission coil unit has a predetermined parallel resonance frequency that coincides with a resonance frequency of the power reception coil unit incorporated in the bipolar electric knife 11 or the like.
  • a power reception coil unit may be provided in which the power reception coil 17 and the power reception capacitor 19 are connected to the conversion circuit 18 electrically in parallel and inductance of the power reception coil 17 and capacitance of the power reception capacitor 19 are respectively set such that the power reception coil unit has a predetermined parallel resonance frequency that coincides with a resonance frequency of the power transmission coil unit incorporated in the trocar 1 or the like.
  • a coil unit configured to resonate in serial resonance and a coil unit configured to resonate in parallel resonance may be concurrently used.
  • the trocar 1 including the power transmission coil unit configured to resonate in serial resonance and the bipolar electric knife 311 including the power reception coil unit configured to resonate in parallel resonance may be concurrently used.
  • the respective coil units (the power transmission coil unit, the power reception coil unit, and the relay coil unit) is not limitedly configured by connecting one set of a coil and a capacitor in series.
  • the respective coil units may be configured using stray capacitance of the coil itself instead of the capacitor.
  • the electric terminal is not limitedly attached to the power transmission coil of the power transmission coil unit.
  • electric power from a power supply device may be supplied to an electric terminal 321 A provided in a closed loop coil 321 .
  • the closed loop coil 321 and a power transmission coil 322 may be respectively arranged to be separated by a space in which the electromagnetic induction phenomenon can be generated.
  • FIG. 31 is a diagram showing an example of a configuration capable of being incorporated in the power transmission coil unit.
  • the power transmission capacitor of the power transmission coil unit may be configured to be provided on the inside of the power supply device 21 .
  • the respective embodiments explained above are also applicable to a medical instrument other than the bipolar electric knife as long as the medical instrument is inserted into the trocar and used. More specifically, even if, for example, an endoscope, a monopolar electric knife, an ultrasound treatment instrument, and the like are used instead of the bipolar electric knife, the respective embodiments explained above can be carried out.
  • a power storage device such as a battery in a medical instrument including a power reception coil unit
  • electric power corresponding to a state of use of the medical instrument may be supplied from the power storage device.
  • electric power received in the power reception coil unit of the bipolar electric knife may be directly supplied to the treatment electrodes not via the conversion circuit.
  • an impedance matching circuit may be provided in any one of the power supply device, the trocar, or the conversion circuit of the bipolar electric knife.
  • the impedance matching circuit by controlling the impedance matching circuit according to, for example, a change in a position and a posture between the power transmission coil and the power reception coil or a change in a load state in the medical instrument including the power reception coil unit, it is possible to optimize transmission efficiency in performing power supply making use of the magnetic field resonance phenomenon.

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EP2865348A4 (de) 2016-04-27
JP5965741B2 (ja) 2016-08-10
JP2014004237A (ja) 2014-01-16
EP2865348A1 (de) 2015-04-29
CN104321029A (zh) 2015-01-28
EP2865348B1 (de) 2017-03-08

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